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Old 22nd May 2003, 11:45 AM   #1
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Default information needed...Antique Sound USA PA-3 preamp

Gentlemen

I purchased but haven't received as yet a PA-3 preamp. According to what I have been told it has 3 5814A tubes. It is non-working and I would like to find some information before I tear into it to either gut it and start over or to repair it.

Frank

It looks like I may have to draw up yet another schematic. OH GOD!

Any help or information would be much appreciated.


Joe
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Old 22nd May 2003, 11:50 AM   #2
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Default NOT SO ANTIQUE...

Hi Joe,

IIRC this company is/was based in Arizona but I need to check.

5814s are, ahum...12AU7s.

I'll check later this afternoon...need some coffee first.

Cheers,
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Old 22nd May 2003, 05:58 PM   #3
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Thumbs down BAD NEWS.

Hi Joe,

Did a google this afternoon but their website is redirecting to a useless site.

I hope the preamp is hardwired, so much easier to draw the schematic.

Cheers,
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Old 22nd May 2003, 09:23 PM   #4
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Frank

Thanks for trying. I think I will probably scrap the circuit(pc boards) and 12au7's and go for something better. Any ideas on circuit would be appreciated.

Joe



I will draw up the schematic and post it for others to look at before I scrap it.


OH God, another hand drawn schematic
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Old 22nd May 2003, 09:31 PM   #5
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Hi Joe,

If you don't need any gain why not try the linestage I posted?

Just let us know your need and maybe we can help you out..?

Cheers and all the best,
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Old 22nd May 2003, 09:55 PM   #6
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Frank


Would your circuit be under "Franks preamp"? If so, I don't have a doubt as to its performance. I may however need some guidance.

Joe
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Old 22nd May 2003, 10:05 PM   #7
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Hi,

Yes Joe.

I am here to help all members, so no probs.

Cheers,
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Old 29th May 2003, 11:48 AM   #8
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Are they still in business?
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Old 29th May 2003, 10:14 PM   #9
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Hi Joe,

If you mean Antique etc...I wouldn't know.

Have you checked the phone listings?

Cheers,
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Old 29th May 2003, 11:28 PM   #10
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I got my preamp today and half the transformer is trashed. I had to disconnect one side of it to remove the short. The reading I took are as follows: orange pair of wires 51volts ac, blue pair of wires 3.2 volts ac, purple pair of wires 121volts ac. I assume I need a transformer with secondaries of 6.3 volts, 100volts, and 240 volts. If this is correct where do I find one?

Joe
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